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Bryan Frazier, shark biologist at South Carolina Department of Natural Resources (SCDNR), confirmed the fish in the video is “definitely a shark” and likely a blacktip chasing a smaller fish, "likely a mullet."

“The surf zone is definitely a feeding area for sharks, everything from 12-inch Atlantic sharpnose to larger blacktip sharks,” he said.

Frazier declined to give an estimate of how many sharks are swimming off the South Carolina coast at this time of the year, but said the number is probably more than people think.

Thousands of sharks show up along the South Carolina coast in the summer. Here are a few of the species you're most likely to see — and which ones are considered the most dangerous to humans based on past attacks.

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“I still swim in the ocean and my kids do, too. I always tell people it’s safe to swim in the ocean,” the shark scientist said.

Through Frazier's studies, he’s developed a theory that might bring South Carolina beachgoers some comfort.

“A good majority of the shark bites here involved small sharks that immediately release after they made human contact so they were more of a bite than an attack,” he said.

Hilton Head Island charter Outcast Sport Fishing reels in a tiger shark that has been caught several times in Port Royal Sound, S.C. since being tagged in 2015.

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“The big sharks are mostly in the sounds and not near the beaches, and typically feed there, too,” he said.

Frazier said he’s learned that pups, also known as baby sharks, head "straight to the rivers" when they’re born in the Lowcountry sounds and smaller sharks are more likely to be in the surf or the rivers.

“Bigger sharks will devour smaller sharks, so the pups stay clear of the sounds and open ocean and head for the rivers where they can find a food source,” he said.

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